How safe is the journey?

The trip to Mars cannot be called risk free. Like any venture in any means of travel, there are always things that could go wrong. In the case of Mars One, the following risks are conceivable:

Accident(s) during launch

Vital components could malfunction during the journey there

A number of issues might present themselves when entering Mars' atmosphere

There could be problems when landing

Mars One will take every possible precaution to make sure the mission is as safe as can be:

The rocket will be tested unmanned dozens of times before the astronauts so much as see it.

Mars One uses technology that has been operating on the International Space Station for years, and have already planned for important components to be meticulously tested before use.

By the time the astronauts start their journey, the process of entering Mars' atmosphere will already have been performed several times by unmanned capsules.

Although traveling to Mars will evidently bring risks, if you were to compare our mission to the first Moon mission in 1969, it quickly becomes apparent that this mission is much safer. At the time of Apollo 11, there was a great deal of pressure to rush proceedings, and was therefore never properly tested. For example, the lunar lander hadn't even been tested once.